diff --git a/routing.rst b/routing.rst
index b2e252d87b5..453a4737d9d 100644
--- a/routing.rst
+++ b/routing.rst
@@ -640,6 +640,11 @@ concise, but it can decrease route readability when requirements are complex:
             // ...
         };
 
+.. versionadded:: 5.2
+
+    Since Symfony 5.2, inline parameter requirements are also supported in the
+    host. Before Symfony 5.2, they were supported in the path only.
+
 Optional Parameters
 ~~~~~~~~~~~~~~~~~~~
 
@@ -798,6 +803,11 @@ parameter:
     To give a ``null`` default value to any parameter, add nothing after the
     ``?`` character (e.g. ``/blog/{page?}``).
 
+.. versionadded:: 5.2
+
+    Since Symfony 5.2, inline parameter default values are also supported in
+    the host. Before Symfony 5.2, they were supported in the path only.
+
 Priority Parameter
 ~~~~~~~~~~~~~~~~~~